Every time you think Hollywood has reached the final frontier of ideas that no sentient creature would ever consider throwing money at, they break on through to the other side. Hence, Rihanna in Battleship. No joke: The “Umbrella” singer is starring in a $200 million adaptation of the old board game with Alexander Skarsgård and Liam Neeson. What’s next, Ke$ha in $tratego? Who cares whether it’s any good – the artistic achievement is in the awfulness of the idea. Battleship? Sunk!